A 90/10 is streetable with a 14/175....tons do it. Each car is different, but this is a combo that is tried and true. Thats all I am saying. Sure a adj is better though, thats why i eventually swapped to adjustables.
Not trying to start a debate here, all's I was trying to say was a 90/10 can do more than poke around on the street. They work fine..stop n go, highway, in traffic what ever....my car just rode like a caddy is all. HAHA.
I dont know why I'm even in the 03-04 Cobra section trying to give tech...I don't even own one. I was only trying to help since I have ran Lakewood 90/10s, 70/30s, Comp Eng 90/10s, and Strang adjustables. As for spring rates i have ran 14" 130/150/175/225 and 12" 175/225 along with a variety of standard springs suchs a Eibach Drag etc so I do have a lil experience. I was only trying to give my real world data.
-Chris